1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a52ebafeb7a17b120b9c2f0c1418e5b1f69d12184e1062c38ff9c13f0ac86e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97e5ef02-47ba-43db-b916-bc8555212b78.json and https://artists.proofprofile.net/proofs/artist/97e5ef02-47ba-43db-b916-bc8555212b78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5b77c83a1fa0be167312f6a5a03c8a89c1e453f4e36c39285a5402e17a730. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6F2244863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaaa46d6871ce0bd155ab5ec528fab88b98b4e774385c635336a639d4ee0c0d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN72326334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7eca1c60d01a2c9bcffe6116cab05bf82f2db1adda989d85eb1ffff3aa36d4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2353390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6447dd348c549d5937b70f6e19b959e36ebb95aebd28e7de627eade88a55a7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2361430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e800643c65ebe1c429e99046a5d6e3036ad3f88d3f41bffdacb8f71c2503b6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2361431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08606165ce20b14df01c385dde13d48dadc5ebf40953b0418b03a94a267414. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2361432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e9701684272267d44e692706e8cfbe4fcbb363cf9ba0354cfcf0817f70f72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2361433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d8dac327dd18c655133982815e46012763ab8593411c5ab7952ab748eed55. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2361435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a904ff6adbf4fc976821f0084865e35613c054a6d11cca7496e80bbe7b453d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2357717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4120fc5bfd9388e77ffd0871579fef2e0fda0cafa5cdbeca40f04e31c5567. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2385446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130a713940b428cf0a74f5d2cafe24a724dc72cf4f8bf33d552141166698535a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4b94445de1b5ce6ba98b81e473f762acf9298f6cc194d2cb00b9a04110e2a8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6698f912144b78996ff8c330c27a0800521c7a888fd5e65bd72fe8b962724e. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dcd4fe38260f9f1ad44ed74425aeedc6f4e5d381ffd1422115c11fbd1c4b84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b57c6f33b8347812a815f337f86e16873257f882245724c10b51a2822f542. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705ecfae11070b09ff3ecb8bdd85dcb430d2f6f2cbe7dee1948611ad195bc698. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbd39c32b8fe072ab635a9d3b09e1d47e2b8678d42b5840f20e76aa2374dbb1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAW2291206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f547420815a26d089fa5c8282d5f3ca5be3c5251328e402b0a8f00993c4551. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e03c7ba5b99fba78e715852cccd48668fd37939e31af8bdf337a0b5fc7425. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2465635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66767723147fd942e4c45a0bc1b7579aeee0354e311d65309fdeedf84397c3. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2480149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07154f56f2c8e304f42f48113ad81f99101c4fe2262b4fb8fdd00038e6ac989. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2433336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf935bf2193ba34783fc58a4cdb4b76ec3ae400859031150016a860929f79a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2487846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767022fff42e74478f2ca759c714d9fc8eec834ff99b29573d0dd02e4e50082. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9M2431809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f407a0dadc4954e41f7f788454338db8317bebe55a567bf2e704525064ec2a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLFP2463269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef5ad9328e6cbd58a10bd725d5490f9bd826f6a3b8cd30076aee1070eddc91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2492357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef5ad9328e6cbd58a10bd725d5490f9bd826f6a3b8cd30076aee1070eddc91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2492357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce96ac1f1337cd0f9beab3be770d1a3c75f3f6eaef31853f2af306e20ca12d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2170836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b364ebbb45bafdc74574a3596ad4c18ad2852d95ad365277b81b8817868e42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BK4DA2412401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbca70fcf3054128317b88dd0ca933cb66e4ddde6b8086c41043f632114b101. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6HN2333646.